Improved spring-back chair



R. H, STAPLES.

SPRING BACK CHAIR.

No. 44,987. Patented Nov. 8, 1864.

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N FH x- W "n l j f-' Q @h w UNITED STATES OFFICE.

ROBERT II. STAPLES, OF'LOVVELL, MASSAGHUSE'IIIS.v

IMPROVED 'SPRING-BACK CHAIR.-

`Speeiicaiion forming part of Letters Patent N0. 114,987, dated November 8, 1864.

To @ZZ wwm t may concern-.-

Be it known that l, RoEEE'r Il. STAPLES, of Lowell, county of' Middlesex, and State of Massachusetts, Illave'invented Anew and useful Improvements in Self-Adjusting Spring- Back Chairs; and I do hereby declare that the followingis a. full and exact description thereof, reference being had .-to the accompanying drawings, and to the letters of reference marked thereon, nia-king a part oi' thisspeeieatoih ,The nature of my invention consists in tbearrangement and construction o t' the springs B,tl1e adiustable back; (1 the punts; I), the Springs; E, the connecting-bar.

The person being seated, the back B ada-pts itself to the convenience and ease of the oecupant by 'turning on thepivots C in the bearings of the stationary back A, the back B receiving its pressure or relaxation, at the will of the occupant, by means of the springs D. The occupant having risen, the adjustable back B resumes its former position by means of the springs D, and is stopped at a given point by the connecting-bar E.

lthat I claim as my invention, and desire to' A'seeureby Letters Patent, is-

The backs of chairs, mounted on pivots, in

combination with the springs, substantially as described, vand for the purposes set forth. 'EoEEnfr n. STAPLES. Witnesses: A AHIEE PEVEY,

- GEORGE E. PEVEY. 

